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Education and Experience

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Welcome to the website of AvioConsult

AvioConsult, an independent aircraft expert and consultant, offers:

  • Teaching on Airplane Control after Engine Failure, because the knowledge of controlling a multi-engine airplane after engine failure, as taught at Aeronautical Universities and Experimental Test Pilot Schools, is not passed on anymore to (airline) pilots since some 40 - 50 years ago, leading to a fatal accident almost every month.
    Please check the Recent activities below, the Downloads page for papers and the Accidents page for accident reports.
  • Advice and teaching on airplane flying qualities, performance and (experimental) flight-testing;
  • Expertise for accident investigations and is available as expert witness;
  • Aircraft accident investigation report reviews, please check the Downloads page and the Accidents page for samples;
  • Writing manuals and checklists.

Education and experience are presented below.

Main activities: the prevention of airplane accidents after engine failure

Why do accidents after engine failure or while an engine is inoperative continue to happen on big and small multi-engine airplanes nearly every month?
Because flight manuals, student pilot textbooks and training manuals inappropriately use paragraphs out of Aviation Regulations (Part 23 and 25) that are intended to be used for the design, certification and flight-test of airplanes but definitely not for their operational use. This inappropriate use of Regulations results in deficient minimum control speed definitions and engine emergency procedures for pilots and hence, in inappropriate crew response to propulsion system malfunctions.
Want to read more about this? Please proceed to the Downloads page and/ or the Accidents page.

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List of Publications and Presentations of AvioConsult

Please refer to the Downloads and Accidents pages for many more papers and publications.



1999-11 Netherlands, Magazine Veilig Vliegen. Flying safely with a dead engine
2008-12 Netherlands, Magazine Piloot en Vliegtuig. Controllability of multi-engine airplanes after engine failure
2013-10 Germany, Zeitschrift Pilot und Flugzeug. Steuerbarkeit mehrmotoriger Flugzeuge nach einem Triebwerksausfall
2015-07-12 Wikipedia EN. Article Minimum Control Speeds. Regrettably ruined by incompetent writers. The original can still be read by scrolling fully down to 2015 in History on the article page



2000 Eindhoven Air Base. Flying safely with a dead engine
2000-01-27 Amsterdam, NVvL. Flying safely with a dead engine
2000-09-19 Hoofddorp, VNV (Dutch ALPA). Flying safely with a dead engine
2002-01-15 USA, FAA Engine & Propeller Directorate. Aircraft Control at Airspeeds Near Air Minimum Control Speed VMCA
2003-09 AFFSCE, Noordwijk. Airplane Control during Takeoff or Go-Around after Engine Failure
2006-02-16 OVV (DTSB), The Hague. Prevention of Airplane Accidents after Engine Failure
2006-03-14 FSF - EASS, Athens. Staying Alive with a Dead Engine – How to prevent a dead engine from turning into a killing engine
2011-03-15 TU Delft. Role of Experimental Flight Testing in Design, Development, Certification and Operation of Aircraft
2012-09-18 KIVI, The Hague. Accidents after Engine Failure
2013-04-25 LBA Braunschweig. Control and Performance During Asymmetrical Powered Flight
2014-04-16 TU Delft, Symposium Sipke Wynia. Accidents after Engine Failure
2015-04-15 Catalina Flight Crews. Control and Performance During Asymmetrical Powered Flight
2019-06-05 EuroControl Safety Forum, Brussels. Safety Critical Procedure Development requires high level multi-disciplinary knowledge
2013-2020 DC-10 accident Faro. Several: Afterworknet, NVvL, KIVI, KNVOL, Lions Clubs, Probus


Education and experience

  • Graduated as Flight Test Engineer at the USAF Test Pilot School, Edwards Air Force Base, CA (class 1985A).  Refer to the links page.
  • Over 15 years of experience in conducting and reporting on experimental flight tests with, and qualitative evaluations of, aircraft on subjects: performance, flying qualities, airborne systems, ergonomics of crew stations, airborne system software, etc.
  • Five years experience as Chief Experimental Flight Test of the Royal Netherlands Air Force (LtCol ret'd), responsible for experimental flight testing of all Air Force fixed wing and helicopter types, evaluation of new aircraft and aircraft systems and all operational aircraft manuals.
  • Contributed to design meetings and reviews for procurement, modification and certification, and to (experimental) flight testing of:
    • Fixed wing aircraft: KDC-10, C-130, F27, F50, F60, PC-7, Gulfstream IV, A330, NF-5 and F-16;
    • Helicopters: BO-105, AB-412, AS-532 Cougar, CH-47 Chinook, AH-64A Apache and Alouette III;
    • Unmanned Aerial Vehicle: Sperwer.
  • Participated in start-up of EADS-CASA A330 tanker program.
  • Also experienced with light, very light and ultra light airplanes and gliders.
  • Developed aircrew checklists and other flight operations related documentation.
  • Evaluated flight operations support software.
  • Participated in NATO Avionics and Navigation Systems Working Groups.
  • Performed Quality Management System auditing (ISO 9001:2000) as both auditor and lead auditor (qualified by DNV).
  • Reviewed aircraft accident investigation reports of accidents with C-130 Hercules, Saab SF-340, Nomad, Boeing 737 and 747, Piper PA 44-180, Beech C90, BN-2, Cessna 404, MU-2B, DC-10, EMB-120, etc., and wrote (supplemental) reports (please refer to the Accidents page).
  • Provided aircraft expertise as expert witness in law suits in USA and NL.
  • Received flight test training and flight test experience during the USAF TPS course (1985) in: T-38A, C-130H, F-5F, RF-4C, YF-4E, NC-131H, UH-1H, CH-136A, KC-135, Learjet, A-37B, P-3C, NC-141A, T-34C, DHC-2, DHC-6, Boeing 707, Boeing 737, KC-10A, T-39, T-43, S-3 and in simulators B-747, B-767, B-727, A-10.

Private flying experience

  • Private Pilot License (EU and US) and flying experience in: C-150, C-172, PA-18-135, T-67M, DV20, P92, Rallye 150T, SF28.
  • Glider and Powered Glider Pilot, instructor and examiner in many different types.

Would you like to learn more about Test Pilot Schools? Please check the Links page.

Company registration

AvioConsult is registered under number 28091749-0000 at the Chamber of Commerce, The Netherlands.
General Terms and Conditions, deposited at the Chamber of Commerce, apply to the provision of services and provided material.  A copy will be sent upon request.

Warranty, Copyrights, Liability

Disclaimer of warranties. AvioConsult will make no express warranties regarding the contents of, and the materiel offered on this website; the downloadable materiel is being provided "as is" without warranty of any kind.  AvioConsult disclaims all warranties with regard to the downloaded materiel, express or implied. 

The copyright of the material contained in and downloaded from this web site belongs to and remains with AvioConsult unless specifically stated otherwise in writing. Unless specifically stated otherwise, you may download one copy of the content for informational, non-commercial and personal use only, provided you keep intact all copyright notices and do not modify the content.

Files are registered to protect the copyrights.

Liability Limit. AvioConsult will not be liable for any direct or indirect loss arising from the use of the information and material contained in or downloaded from this web site, including interruption of business, any direct, indirect, special, incidental, or consequential damages of any kind.

The links to third party web sites are provided for your convenience and information only.  Use of the links is at your own risk.